[ios] UIView Hide/Show with animation

Swift 3

func appearView() {
     self.myView.alpha = 0
     self.myView.isHidden = false

     UIView.animate(withDuration: 0.9, animations: {
         self.myView.alpha = 1
     }, completion: {
         finished in
         self.myView.isHidden = false
     })
}